Ubuntu update for linux-aws-5.3



| Updated: 2025-04-23
Risk Low
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2020-12655
CVE-2020-12771
CVE-2020-15393
CVE-2020-24394
CWE-ID CWE-400
CWE-20
CWE-401
CWE-732
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

linux-image-aws (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.3.0-1033-aws (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-azure (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.3.0-1035-azure (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gke-5.3 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.3.0-1033-gke (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gkeop-5.3 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.3.0-65-lowlatency (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.3.0-65-generic (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Resource exhaustion

EUVDB-ID: #VU28165

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-12655

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources in "xfs_agf_verify" in "fs/xfs/libxfs/xfs_alloc.c" file. A local user can use an XFS v5 image with crafted metadata, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-aws-5.3 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-aws (Ubuntu package): before 5.3.0.1033.32

linux-image-5.3.0-1033-aws (Ubuntu package): before 5.3.0-1033.35

linux-image-azure (Ubuntu package): before 5.3.0.1035.31

linux-image-5.3.0-1035-azure (Ubuntu package): before 5.3.0-1035.36

linux-image-gke-5.3 (Ubuntu package): before 5.3.0.1033.18

linux-image-5.3.0-1033-gke (Ubuntu package): before 5.3.0-1033.35

linux-image-gkeop-5.3 (Ubuntu package): before 5.3.0.65.121

linux-image-5.3.0-65-lowlatency (Ubuntu package): before 5.3.0-65.59

linux-image-5.3.0-65-generic (Ubuntu package): before 5.3.0-65.59

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4465-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Input validation error

EUVDB-ID: #VU28169

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-12771

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a deadlock if a coalescing operation fails in "btree_gc_coalesce" in "drivers/md/bcache/btree.c" file. A local user can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-aws-5.3 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-aws (Ubuntu package): before 5.3.0.1033.32

linux-image-5.3.0-1033-aws (Ubuntu package): before 5.3.0-1033.35

linux-image-azure (Ubuntu package): before 5.3.0.1035.31

linux-image-5.3.0-1035-azure (Ubuntu package): before 5.3.0-1035.36

linux-image-gke-5.3 (Ubuntu package): before 5.3.0.1033.18

linux-image-5.3.0-1033-gke (Ubuntu package): before 5.3.0-1033.35

linux-image-gkeop-5.3 (Ubuntu package): before 5.3.0.65.121

linux-image-5.3.0-65-lowlatency (Ubuntu package): before 5.3.0-65.59

linux-image-5.3.0-65-generic (Ubuntu package): before 5.3.0-65.59

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4465-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Memory leak

EUVDB-ID: #VU31921

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-15393

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform DoS attack on the target system.

The vulnerability exists due memory leak in "drivers/usb/misc/usbtest.c" file. A local user can force the application to leak memory and perform denial of service attack.

Mitigation

Update the affected package linux-aws-5.3 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-aws (Ubuntu package): before 5.3.0.1033.32

linux-image-5.3.0-1033-aws (Ubuntu package): before 5.3.0-1033.35

linux-image-azure (Ubuntu package): before 5.3.0.1035.31

linux-image-5.3.0-1035-azure (Ubuntu package): before 5.3.0-1035.36

linux-image-gke-5.3 (Ubuntu package): before 5.3.0.1033.18

linux-image-5.3.0-1033-gke (Ubuntu package): before 5.3.0-1033.35

linux-image-gkeop-5.3 (Ubuntu package): before 5.3.0.65.121

linux-image-5.3.0-65-lowlatency (Ubuntu package): before 5.3.0-65.59

linux-image-5.3.0-65-generic (Ubuntu package): before 5.3.0-65.59

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4465-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Incorrect permission assignment for critical resource

EUVDB-ID: #VU51240

Risk: Low

CVSSv4.0: 5.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-24394

CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource

Exploit availability: No

Description

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to incorrect assignment of permissions on new filesystem objects when the filesystem lacks ACL support in fs/nfsd/vfs.c (in the NFS server). A local user can read and write arbitrary files on the system.

Mitigation

Update the affected package linux-aws-5.3 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-aws (Ubuntu package): before 5.3.0.1033.32

linux-image-5.3.0-1033-aws (Ubuntu package): before 5.3.0-1033.35

linux-image-azure (Ubuntu package): before 5.3.0.1035.31

linux-image-5.3.0-1035-azure (Ubuntu package): before 5.3.0-1035.36

linux-image-gke-5.3 (Ubuntu package): before 5.3.0.1033.18

linux-image-5.3.0-1033-gke (Ubuntu package): before 5.3.0-1033.35

linux-image-gkeop-5.3 (Ubuntu package): before 5.3.0.65.121

linux-image-5.3.0-65-lowlatency (Ubuntu package): before 5.3.0-65.59

linux-image-5.3.0-65-generic (Ubuntu package): before 5.3.0-65.59

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4465-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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